Ruling · Naraka Caturdaśī (Choti Diwali) · 1911

Saturday 21 October

Determinatein Baoding, under the Rashtriya Panchang method. Clear of every threshold by 320 minutes.

Decide it for

38°52′ N 115°28′ E · Asia/Shanghai · GeoNames 1816971

The two dawns

One ghaṭī is 24 minutes. Aruṇodaya is 2 muhūrtas before sunrise.

Dawn of Friday 20 October

Caturdaśī is absent from aruṇodaya. Not taken.

04:48 aruṇodaya beginssunrise 06:31
04:2404:4805:1205:3606:0006:2406:48

0 of 103 minutes covered

Dawn of Saturday 21 October

Taken. The only dawn Caturdaśī reaches.

04:49 aruṇodaya beginssunrise 06:32
04:2504:4905:1305:3706:0106:2506:49

104 of 104 minutes covered

Caturdaśī presentAruṇodaya, the window the rule readsThe instant the tithi begins or ends

How it was decided

  1. 01

    Aṅga

    Caturdaśī runs from 12:04 on Fri 20 Oct to 11:52 on Sat 21 Oct.

    1911-10-20T04:04:26Z → 1911-10-21T03:52:24Z

  2. 02

    Kāla

    Aruṇodaya is 2 muhūrtas before sunrise: 04:48–06:31 on the 20th, 04:49–06:32 on the 21st.

    arunodaya: prev-night-muhurta-14-15 · sunrise and sunset: upper limb, 31′ + 16′

  3. 03

    Rule

    Caturdaśī must be present during aruṇodaya. It covers 0 of 103 minutes on the 20th and 104 of 104 on the 21st.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104

  4. 04

    Tie-break

    Only one dawn qualifies. No tie-break is needed.

    priority: purvaviddha → only-day · margin 19204 s

  5. 05

    Ruling

    Naraka Caturdaśī, Baoding, 1911: Saturday 21 October.

    confidence: determinate

Say it like this

In Baoding, Naraka Caturdaśī (Choti Diwali) 1911 falls on Saturday 21 October. Caturdaśī runs from 12:04 on Fri 20 Oct to 11:52 on Sat 21 Oct and covers all of aruṇodaya that dawn.

ahargana.org/baoding/festivals/1911/naraka-chaturdashi · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingSat 21 Oct
Ahargaṇa, classicalDisc centre, no refractionSat 21 Oct
compat-drikpanchangComparison profileSat 21 Oct
No institution has a recorded ruling for Baoding.

Institutional rulings are recorded with a source address, and are never edited to agree.

The rule, as data

/rules/naraka-chaturdashi · ruleset 2026.3-draft

Month
Āśvina, amānta
Pakṣa · aṅga
Kṛṣṇa · Caturdaśī
Kāla
Aruṇodaya
Priority
Pūrvaviddhā
Tie-break
First day
Reference
CRC 1955, p. 104

“K 14 Naraka caturdasi (covering a period of 4 ghatikas before sunrise, if occurs on two successive days, it is to be observed on the first day)” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceCaturdaśīAruṇodaya 20thCoveredAruṇodaya 21stCoveredRuled
Los Angeles20:04 → 19:5204:19102 min04:200 min20 Oct
Chicago22:04 → 21:5204:23104 min04:240 min20 Oct
Jersey City23:04 → 22:5204:28104 min04:290 min20 Oct
Port of Spain00:04 → 23:5204:1897 min04:180 min20 Oct
London04:04 → 03:5204:43108 min04:450 min20 Oct
Durban06:04 → 05:5203:450 min03:4589 min21 Oct
Dubai07:45 → 07:3304:200 min04:20100 min21 Oct
Delhi09:34 → 09:2204:440 min04:44101 min21 Oct
Kolkata09:34 → 09:2203:550 min03:56100 min21 Oct
Singapore11:04 → 10:5204:120 min04:1295 min21 Oct
Sydney14:04 → 13:5203:420 min03:4188 min21 Oct
Suva15:59 → 15:4703:590 min03:5892 min21 Oct
Profile · tradition
pac-rp@2026.1 · smarta
Rule
naraka-chaturdashi@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

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